Abstract

We have designed an original approach for efficient Second Harmonic Generation of tailored V-shape benzo[b]thiophene molecular systems enabling versatile and flexible one-step, dry and technologically friendly thin film processing. The designed moieties show χ(2) values at least as high as the reference LiNbO3 single crystal, without poling processing and matching the constrains of integrated optical configuration for nonlinear optical devices. This may open the way to a new class of organic materials exploitable for photonic applications.

References

See the recent Strategic Research Agenda in Photonics "Toward a Bright Future for Europe," www.Photonics21.org.

"Harnessing Light" study (National Research Council, USA, 1998).

Among many excellent publications and books see for example:J. L. Oudar and D. S. Chemla, "Hyperpolarizabilities of nitroanilines and their relations to the excited state dipole moment," J. Chem. Phys 66, 2664-2667 (1977).
[CrossRef]

1986 (1)

1977 (1)

Among many excellent publications and books see for example:J. L. Oudar and D. S. Chemla, "Hyperpolarizabilities of nitroanilines and their relations to the excited state dipole moment," J. Chem. Phys 66, 2664-2667 (1977).
[CrossRef]

Chemla, D. S.

Among many excellent publications and books see for example:J. L. Oudar and D. S. Chemla, "Hyperpolarizabilities of nitroanilines and their relations to the excited state dipole moment," J. Chem. Phys 66, 2664-2667 (1977).
[CrossRef]

Oudar, J. L.

Among many excellent publications and books see for example:J. L. Oudar and D. S. Chemla, "Hyperpolarizabilities of nitroanilines and their relations to the excited state dipole moment," J. Chem. Phys 66, 2664-2667 (1977).
[CrossRef]

Chem. Phys. Lett. (1)

J. Chem. Phys (1)

Among many excellent publications and books see for example:J. L. Oudar and D. S. Chemla, "Hyperpolarizabilities of nitroanilines and their relations to the excited state dipole moment," J. Chem. Phys 66, 2664-2667 (1977).
[CrossRef]

One-photon absorption spectra of 2,3-Bis-(2,2’bithiophen-5-yl)-benzo[b]thiophene1,1-dioxide (V-BT1, red-circles) and of 2,3-Bis-(3,3’-dicyclohexyl-[2,2’]bithiophenyl-5-yl)-benzo[b]thiophene1,1-dioxide (V-BT2, blue-line) thin films. The films are vacuum deposited and are 80nm thick. The vertical line marks the expected SHG signal.

The variation of χ(2)xxz () and χ(2)zzz () versus the films thickness for films of 2,3-Bis-(3,3’-dicyclohexyl-[2,2’]bithiophenyl-5-yl)-benzo[b]thiophene1,1-dioxide (V-BT2). The data are affected by a 10% error bar.